Insert mySQL query if checkbox checked/not checked with PHP - php

Question

During the process of trying to develop an checkbox activated mySQL query based on the value inside a checkbox i've incurred an problem which i can't get past, I've tried the following at the moment
<input type="checkbox" name="status" onclick="updateStatus(<? echo $data['id']; ?>,this.checked)">
The Javascript/Ajax code for the function "updateStatus" is as followed
function updateStatus(id,value) {
if (window.XMLHttpRequest) {
http = new XMLHttpRequest()
} else if (window.ActiveXObject) {
http = new ActiveXObject("Microsoft.XMLHTTP")
} else {
alert("Your browser does not support XMLHTTP!")
}
http.abort();
http.open("GET", "../functions/ajax.php?check=update_status&id=" + id + "&checked="+value, true);
http.onreadystatechange = function () {
if (http.readyState == 4) {
alert(http.responseText);
}
}
http.send(null)
The PHP function inside functions/ajax.php
if(isset($check) and $check == 'update_status' and isset($_GET['id'])){
$id = mysql_real_escape_string($_GET['id']);
$checked= mysql_real_escape_string($_GET['checked']);
if($checked == true) {
echo "Checked";
} elseif($checked == false) {
echo "Not checked";
} else {
echo "Invalid response";
}
when using this code it always returned "Checked" any idea why ?

Answer 1

try this (code tested),
<input type="checkbox" name="status" onclick="updateStatus(<? echo $data['id']; ?>,this.checked)">
You will get second parameter as true or false;
function updateStatus(id,checked) {
if (window.XMLHttpRequest) {
http = new XMLHttpRequest()
} else if (window.ActiveXObject) {
http = new ActiveXObject("Microsoft.XMLHTTP")
} else {
alert("Your browser does not support XMLHTTP!")
}
http.abort();
http.open("GET", "../functions/ajax.php?check=update_status&id=" + id+"checked="+checked, true);
http.onreadystatechange = function () {
if (http.readyState == 4) {
alert(http.responseText);
}
}
http.send(null)
You PHP will be:
if(isset($check) and $check == 'update_status' and isset($_GET['id']) AND isset($_GET['checked'])){
$id = mysql_real_escape_string($_GET['id']);
$checked= mysql_real_escape_string($_GET['checked']);
if($checked == true) {
$query = mysql_query("SELECT * FROM `check_status` WHERE `user_id` = '$_SESSION[userid]' and `id` = '$id'");
else
//some other query
//Then i can insert the query based on if the checkbox checked or not.